1986

5.0

1996

6.6

2002

7.1

2005

6.3

2001

6.7

1995

6.7

2002

7.2

1994

7.0

2005

6.8

2016

5.0

2009

4.5

2013

6.7

2017

6.8

2004

5.6

1987

7.3

1999

6.8

1998

6.6

1993

5.5

1984

4.8

1988

5.1